Examinations on the changes in oviduct epithelium during the sexual cycle by light and electronmicroscope in Akkaraman sheep

Abstract

The aim of the study was to examine the changes in the oviduct epithelium during the sexual cycle by light and electron microscope in Akkaraman sheep. In this study; 10 oestral (follicular phase), 10 luteal and 5 anoestral phase samples were collected from the infundibulum, ampulla and istmus regions of oviduct from a total of 25 healthy Akkaraman sheeps having reached their puberty. In the light microscopy, it was also observed that, in oestral phase; height of the cells were higher than luteal phase and in the luteal phase nucleus extrusion were seen in the ampulla and infundibulum. It was detected that findings of the anoestrus phase were similar to dioestrus phase. Amount of secrets of secretory cells in the ampulla were elevated during the oestral phase which was determined by histochemical stains. During the oestral phase by using electron microscope, three types of granules were seen in the secretory cells which were especially located in the ampulla. First type of granule was electron lucent and had moderately electron dense substance which was located separetely, right below the granule membran. Second type of granule had carried electron dense focus which had consantric lamels around of. Some of these types of granules were also seen located eccentric to electron dense focus. Third type of granules, which don’t have electron dense focus at the centre, are with consantric lamels. This study showed the histological changes on the oviduct epithelium of Akkaraman sheeps during sexual cycle. The amount and the characterization of the secret in the secretory cells, varied upon the cycle period and the region of the oviduct

Keywords

• Akkaraman sheep
• oviduct
• sexual cycle

Akkaraman koyununda seksüel siklus süresince ovidukt epitelinde meydana gelen değişimlerin ışık ve elektron mikroskobik olarak incelenmesi

Abstract

Bu araştırma, seksüel siklus süresince Akkaraman koyunu ovidukt epitelinde meydana gelen değişimlerin ışık ve elektron mikroskop düzeyde incelenmesi amacıyla yapılmıştır. Çalışmada 10 baş östral (folliküler evrede), 10 baş luteal ve 5 baş anöstrus döneminde olan toplam 25 baş sağlıklı, seksüel olgunluğa erişmiş Akkaraman koyununa ait oviduktun infundibulum, ampulla ve istmus bölgelerinden örnekler alındı. Işık mikroskobik incelemelerde, östral dönemde hücre boylarının daha yüksek olduğu, luteal dönemde hücre boylarının kısaldığı ve ampulla ile infundibulumda çekirdek atılışları gözlendi. Anöstrus dönemindeki bulguların diöstrus ile benzerlik gösterdiği saptandı. Yapılan histokimyasal boyamalarda östral dönemde ampulladaki sekretorik hücrelerde salgı miktarının arttığı belirlendi. Elektron mikroskobik incelemelerde östral dönemde özellikle ampulladaki sekretorik hücrelerde üç tip granüle rastlandı. Bunlar, açık renkli olan ve granül membranının altında dağınık orta yoğunlukta elektron koyu içeriğin bulunduğu birinci tip granüller, elektron koyu bir odak taşıyan ve bu odağın çevresinde konsantrik lamelli bir yapı sergileyen ikinci tip granüller olarak tanımlandı. Bu tip granüllerin bazılarında elektron koyu odağın ekzantrik olarak yerleştiği de gözlendi. Üçüncü tip granüller ise, elektron koyu odak taşımayan konsantrik lamelli granüller olarak belirlendi. Çalışma sonunda Akkaraman koyununda seksüel siklus süresince ovidukt epitelinde histolojik değişiklikler olduğu belirlendi. Sekretorik hücrelerde salgı miktarı ile salgı karakterinin, siklusun dönemlerin ve oviduktun bölümlerine göre değiştiği belirlendi

Keywords

• Akkaraman koyunu
• ovidukt
• seksüel siklus

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